Build A Tricopter - Page 16 - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Nov 23, 2009, 07:39 PM
Registered User
signguy's Avatar
Quote:
Originally Posted by Lomcevac
Hey Bob
is the rear arm 18 inches to allow for the yaw mech and put the prop shaft at 20 inches? What I'm asking is are all three motors at the same distance from the centre or is the rear one two inches closer?
All three at the same distance measured at the prop shaft is correct.
Bob D
Sign up now
to remove ads between posts
Nov 23, 2009, 07:41 PM
Registered User
signguy's Avatar
Quote:
Originally Posted by flipflop
And while we're all asking questions, aproximately how many degrees does the rear motor need to be able to tilt (total) and on the initial setup should it it be tilted a couple of degrees to the right (viewed from the rear)? I know there are a lot of variables here: prop size, motor kv, radio setup, speed controls, gyros, etc. Just trying to cut down on the experimenting time
Move the rear motor as much as possible. It will lean to the right when at neutral. I always try to get lots of movement, my copter spins like a top!.

Bob D
Nov 23, 2009, 07:45 PM
Registered User
signguy's Avatar
Quote:
Originally Posted by rjarois
signguy, i have been following your thread...and i have a cnc machine called a phlatprinter, and was wondering if you thought a foam frame would work...besides the details of the yaw movable motor, and structural bracing, i was wondering what you thought about this concept cut from foam? the gyros fit in 3 pockets aligned to the legs. also the motor mount area is on the same line as the top of the gyro plate. do you think foam would work? thank you for any input you can suggest. randy.
I think that looks cool, but foam, no way. You would need 1/8" light ply at minimum. The other thing, I have seen many frames like this on quads, it has to limit the copters ability to fly in the wind. Being so draggy is going to make holding a position, even in a breeze, difficult. The yaw mechanism is another problem ( not for the quad guys)

Bob D
Nov 23, 2009, 07:59 PM
Registered User
rjarois's Avatar
,,,
Last edited by rjarois; Nov 23, 2009 at 08:07 PM.
Nov 23, 2009, 08:06 PM
Registered User
rjarois's Avatar
fellas, thanks for the feedback regarding the foam frame. bob i will follow your thread with interest. the tri-copter makes more sense than the quad to me. nice build bob. randy.
Nov 23, 2009, 08:16 PM
Where'd The Wise Men Go?!?
AC5FF's Avatar
Quote:
Originally Posted by signguy
All three at the same distance measured at the prop shaft is correct.
Bob D
how critical is this? If I'm off - ???

Have you tried making the arms longer? If I go to 24"-30" other than increasing weight it should still work correct?
Nov 23, 2009, 09:00 PM
Flying with the eagles
etman's Avatar
Quote:
Originally Posted by signguy
Why use a $179 system that is not proven on a tricopter, when you can get the gyros you need for around $120?

Bob D
Hi Bob,

I appreciate your viewpoint and your objective is to make it a low cost and simple tricopter solution. And yes I agree that simple and cheap is good.
I was just thinking out loud about the possibilities.

And what interests me is all these systems were originally made for flybarless helis and it is possible to use it to stabilize a tricopter for aerial photopgraphy. It still requires some technical understanding and "trickery" to adapt it. Anyway I'm not a technical person, not up to that level, so if I build a tricopter I'll stick with your simple solution.
Nov 23, 2009, 09:06 PM
Registered User
rimshotcopter's Avatar
Quote:
Originally Posted by etman
Hi Bob,

Anyway I'm not a technical person, not up to that level, so if I build a tricopter I'll stick with your simple solution.
I am in the same situation as you, I have yet to build my first tricopter and believe in the KISS principle however someone did allot of dreaming plus trial and error to get the design to this stage.
Nov 23, 2009, 09:08 PM
Flying with the eagles
etman's Avatar
Quote:
Originally Posted by bas10an
Hiya Bob, how's it going? Cool thread, just stumbled here the other day, keep it up buddy.

https://www.rcgroups.com/forums/show...&postcount=921

https://www.rcgroups.com/forums/show...&postcount=932

Save yourself the time and money, don't even think about trying the GU365.

I had an AP2000i tricopter as well, there's a secret trick to make it work with ESC's, let me know if you wanna know.



Sebastian.
Thanks Sebastian.
Now we know the GU365 is not suitable.
Nov 23, 2009, 09:20 PM
Registered User
signguy's Avatar
Quote:
Originally Posted by AC5FF
how critical is this? If I'm off - ???

Have you tried making the arms longer? If I go to 24"-30" other than increasing weight it should still work correct?
The longest arms I have tried were 24" ( prop shaft to center ) The copter I fly now is 20", and I just finished a lil' tri that is 12.5" radius. The larger one is easier to setup. I can have the gyros turned way up on the 20" , while the 12.5" copter is very critical, and will flip itself over if the gyros are set too high. I built the small one for fun/aerobatics. I will try some lifting with it just for fun.
I don't know if going much larger than 20-24" will be any better, but if it doesn't work you can always chop the arms back a couple inches.

Bob D
Nov 23, 2009, 09:38 PM
Where'd The Wise Men Go?!?
AC5FF's Avatar
Quote:
Originally Posted by signguy
I don't know if going much larger than 20-24" will be any better, but if it doesn't work you can always chop the arms back a couple inches.

Bob D
See??? There's proof positive that there is no such thing as a stupid question! LOL

All I can say to this is .... DUHHHhhhhh why didn't I think of that?!?!
Nov 23, 2009, 09:57 PM
Registered User
rimshotcopter's Avatar
Quote:
Originally Posted by AC5FF
See??? There's proof positive that there is no such thing as a stupid question! LOL

All I can say to this is .... DUHHHhhhhh why didn't I think of that?!?!
I call that TRAIL AND ERROR. lol
Nov 23, 2009, 09:59 PM
Registered User
rimshotcopter's Avatar
I this is my all time favorite quote: I will not say I failed 1000 times, I will say that I discovered 1000 ways that can cause failure. ~Thomas Alva Edison~
Nov 24, 2009, 01:20 AM
Registered User
Quote:
Originally Posted by reverendrichie
I this is my all time favorite quote: I will not say I failed 1000 times, I will say that I discovered 1000 ways that can cause failure. ~Thomas Alva Edison~
Oh, so that's what I've been doing. I knew I was on the right track!
Nov 24, 2009, 07:45 AM
Registered User
techspy's Avatar
I made mine pretty large. It is very stable and can carry a lot. With 2 3s 2200 batteries on board it can still lift a standard hammer with plenty of power left over. It is about 24" from prop to center.

I want to try some fpv with it but want an auto leveling system first. Sure would like to know the secret to having the AP2000i work with it.

TriCopter dialed in (6 min 17 sec)


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Yet another tricopter build. !!Updated parts list!! SebastianJ Multirotor Drone Talk 2669 Dec 30, 2011 06:48 PM
Discussion What to do? Failed tricopter build! Razor_Racer Coaxial Helicopters 9 Mar 07, 2011 10:20 AM
Discussion Tricopter Build Razor_Racer Coaxial Helicopters 21 Feb 20, 2010 09:24 PM
Build Log Tricopter build SebastianJ VTOLs 1 Dec 22, 2008 05:34 PM
Discussion Trying to build a mechanically actuated tricopter, Help! stefalo Coaxial Helicopters 3 Jan 09, 2008 05:10 PM